柴达木盆地北缘下、中侏罗统古地理及盆地类型研究  

Paleogeography and basin type of the early and middle Jurassic in the northern margin of Qaidam Basin

作　　者：薛建勤[1] 金振奎[2] 齐聪伟[2] 赵明君[1] 杜培志[1] 

机构地区：[1]中国石油青海油田公司勘探开发研究院,甘肃敦煌736202 [2]中国石油大学(北京)资源与信息学院,北京102249

出　　处：《西安石油大学学报（自然科学版）》2008年第2期12-15,共4页Journal of Xi’an Shiyou University（Natural Science Edition）

基　　金：国家973项目(编号:2002CB211702-2);中国石油青海油田公司项目(编号:ZLJL-7.2-01)

摘　　要：柴达木盆地北缘侏罗系后期改造强烈,地层赋存复杂,从地面露头、钻井、地震等资料入手,采用单因素分析多因素综合作图法,对下、中侏罗统岩相古地理进行了定量研究.认为早中、侏罗世时期该区主要发育湖泊相,以滨浅湖-半深湖相为主;现今下、中侏罗统的分布范围并不代表其原始沉积盆地的边界,原始沉积盆地的北边界在南祁连山边界大断裂附近;北缘早、中侏罗世时期为伸展断陷盆地.In the late stage of the Jurassic,the northern margin of Qaidam Basin is intensely remade,and its formation occurrence is complex.Based on core data,outcrop data,drilling data,seismic data and so on,the paleogeography of the early and middle Jurassic is quantitatively studied by using single-factor analysis and multi-factor mapping method.It is held that in the early and middle Jurassic,lake facies develop in the region,and it is mainly shore shallow-half-deep lake facies;its recent distribution range is not the boundary of primary sedimentary basin,and the northern border of the primary sedimentary basin is near the thrust faults of the Southern Qilian Mountains;the northern margin of Qaidam Basin is extensional faulted depression basin during the early and middle Jurassic.

关 键 词：柴达木盆地 侏罗统 沉积特征 沉积相 盆地边界 盆地类型 

分 类 号：TE121.12[石油与天然气工程—油气勘探]